#include<bits/stdc++.h>
#include "rect.h"
#define F first
#define S second
#define PB push_back
#define sz(s) (int(s.size()))
#define bit(n, k) (((n)>>(k))&1)
using namespace std;
typedef long long ll;
typedef pair<int, int> pii;
const int maxn = 2510;
vector<vector<int>> a;
int aftx[maxn][maxn], befx[maxn][maxn], afty[maxn][maxn], befy[maxn][maxn];
int n, m;
set< pair<pii, pii> > st;
bool ok(int LX, int RX, int LY, int RY){
if(LX <= 0 || LY <= 0 || RX >= n-1 || RY >= m-1 || LX > RX || LY > RY)
return 0;
bool ok = 1;
for(int x = LX; x <= RX; x++){
for(int y = LY; y <= RY; y++){
ok&= befx[x][y] >= LY - 1;
ok&= befy[x][y] >= LX - 1;
ok&= aftx[x][y] <= RY + 1;
ok&= afty[x][y] <= RX + 1;
}
}
return ok;
}
ll count_rectangles(vector< vector<int> > a){
::a = a;
n = sz(a);
m = sz(a[0]);
for(int i = 0; i < n; i++){
for(int j = 0; j < m; j++){
befx[i][j] = j-1;
while(befx[i][j] >= 0 && a[i][befx[i][j]] <= a[i][j])
befx[i][j] = befx[i][ befx[i][j] ];
}
for(int j = m-1; j >= 0; j--){
aftx[i][j] = j+1;
while(aftx[i][j] < m && a[i][aftx[i][j]] <= a[i][j])
aftx[i][j] = aftx[i][ aftx[i][j] ];
}
}
for(int j = 0; j < m; j++){
for(int i = 0; i < n; i++){
befy[i][j] = i-1;
while(befy[i][j] >= 0 && a[befy[i][j]][j] <= a[i][j])
befy[i][j] = befy[ befy[i][j] ][j];
}
for(int i = n-1; i >= 0; i--){
afty[i][j] = i+1;
while(afty[i][j] < n && a[afty[i][j]][j] <= a[i][j])
afty[i][j] = afty[ afty[i][j] ][j];
}
}
ll ans = 0;
for(int i = 0; i < n; i++){
for(int j = 0; j < m; j++){
if(ok(befy[i][j] + 1, afty[i][j] - 1, befx[i][j] + 1, aftx[i][j] - 1)){
st.insert( { {befy[i][j] + 1, afty[i][j] - 1} , {befx[i][j] + 1, aftx[i][j] - 1} } );
}
}
}
return sz(st);
}
Compilation message
rect.cpp: In function 'll count_rectangles(std::vector<std::vector<int> >)':
rect.cpp:67:8: warning: unused variable 'ans' [-Wunused-variable]
67 | ll ans = 0;
| ^~~
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
384 KB |
Output is correct |
2 |
Correct |
1 ms |
896 KB |
Output is correct |
3 |
Correct |
1 ms |
896 KB |
Output is correct |
4 |
Correct |
1 ms |
896 KB |
Output is correct |
5 |
Correct |
1 ms |
896 KB |
Output is correct |
6 |
Correct |
1 ms |
896 KB |
Output is correct |
7 |
Correct |
1 ms |
896 KB |
Output is correct |
8 |
Correct |
1 ms |
640 KB |
Output is correct |
9 |
Correct |
1 ms |
896 KB |
Output is correct |
10 |
Correct |
1 ms |
896 KB |
Output is correct |
11 |
Correct |
1 ms |
896 KB |
Output is correct |
12 |
Correct |
1 ms |
896 KB |
Output is correct |
13 |
Correct |
0 ms |
384 KB |
Output is correct |
14 |
Correct |
1 ms |
640 KB |
Output is correct |
15 |
Correct |
1 ms |
512 KB |
Output is correct |
16 |
Correct |
0 ms |
384 KB |
Output is correct |
17 |
Correct |
1 ms |
384 KB |
Output is correct |
18 |
Correct |
0 ms |
384 KB |
Output is correct |
19 |
Correct |
2 ms |
896 KB |
Output is correct |
20 |
Correct |
1 ms |
768 KB |
Output is correct |
21 |
Correct |
1 ms |
512 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
384 KB |
Output is correct |
2 |
Correct |
1 ms |
896 KB |
Output is correct |
3 |
Correct |
1 ms |
896 KB |
Output is correct |
4 |
Correct |
1 ms |
896 KB |
Output is correct |
5 |
Correct |
1 ms |
896 KB |
Output is correct |
6 |
Correct |
1 ms |
896 KB |
Output is correct |
7 |
Correct |
1 ms |
896 KB |
Output is correct |
8 |
Correct |
1 ms |
640 KB |
Output is correct |
9 |
Correct |
1 ms |
896 KB |
Output is correct |
10 |
Correct |
1 ms |
896 KB |
Output is correct |
11 |
Correct |
1 ms |
896 KB |
Output is correct |
12 |
Correct |
1 ms |
896 KB |
Output is correct |
13 |
Correct |
0 ms |
384 KB |
Output is correct |
14 |
Correct |
1 ms |
640 KB |
Output is correct |
15 |
Correct |
1 ms |
512 KB |
Output is correct |
16 |
Correct |
0 ms |
384 KB |
Output is correct |
17 |
Correct |
25 ms |
2176 KB |
Output is correct |
18 |
Correct |
24 ms |
2176 KB |
Output is correct |
19 |
Correct |
24 ms |
2168 KB |
Output is correct |
20 |
Correct |
2 ms |
1792 KB |
Output is correct |
21 |
Correct |
3 ms |
1920 KB |
Output is correct |
22 |
Correct |
3 ms |
1920 KB |
Output is correct |
23 |
Correct |
3 ms |
1920 KB |
Output is correct |
24 |
Correct |
2 ms |
1792 KB |
Output is correct |
25 |
Correct |
1 ms |
384 KB |
Output is correct |
26 |
Correct |
0 ms |
384 KB |
Output is correct |
27 |
Correct |
2 ms |
896 KB |
Output is correct |
28 |
Correct |
1 ms |
768 KB |
Output is correct |
29 |
Correct |
1 ms |
512 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
384 KB |
Output is correct |
2 |
Correct |
1 ms |
896 KB |
Output is correct |
3 |
Correct |
1 ms |
896 KB |
Output is correct |
4 |
Correct |
1 ms |
896 KB |
Output is correct |
5 |
Correct |
1 ms |
896 KB |
Output is correct |
6 |
Correct |
1 ms |
896 KB |
Output is correct |
7 |
Correct |
1 ms |
896 KB |
Output is correct |
8 |
Correct |
1 ms |
640 KB |
Output is correct |
9 |
Correct |
1 ms |
896 KB |
Output is correct |
10 |
Correct |
1 ms |
896 KB |
Output is correct |
11 |
Correct |
1 ms |
896 KB |
Output is correct |
12 |
Correct |
1 ms |
896 KB |
Output is correct |
13 |
Correct |
0 ms |
384 KB |
Output is correct |
14 |
Correct |
1 ms |
640 KB |
Output is correct |
15 |
Correct |
1 ms |
512 KB |
Output is correct |
16 |
Correct |
0 ms |
384 KB |
Output is correct |
17 |
Correct |
25 ms |
2176 KB |
Output is correct |
18 |
Correct |
24 ms |
2176 KB |
Output is correct |
19 |
Correct |
24 ms |
2168 KB |
Output is correct |
20 |
Correct |
2 ms |
1792 KB |
Output is correct |
21 |
Correct |
3 ms |
1920 KB |
Output is correct |
22 |
Correct |
3 ms |
1920 KB |
Output is correct |
23 |
Correct |
3 ms |
1920 KB |
Output is correct |
24 |
Correct |
2 ms |
1792 KB |
Output is correct |
25 |
Correct |
890 ms |
7544 KB |
Output is correct |
26 |
Correct |
867 ms |
7544 KB |
Output is correct |
27 |
Correct |
872 ms |
7544 KB |
Output is correct |
28 |
Correct |
7 ms |
4992 KB |
Output is correct |
29 |
Correct |
18 ms |
5760 KB |
Output is correct |
30 |
Correct |
20 ms |
5888 KB |
Output is correct |
31 |
Correct |
22 ms |
5752 KB |
Output is correct |
32 |
Correct |
19 ms |
5760 KB |
Output is correct |
33 |
Correct |
1 ms |
384 KB |
Output is correct |
34 |
Correct |
0 ms |
384 KB |
Output is correct |
35 |
Correct |
2 ms |
896 KB |
Output is correct |
36 |
Correct |
1 ms |
768 KB |
Output is correct |
37 |
Correct |
1 ms |
512 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
384 KB |
Output is correct |
2 |
Correct |
1 ms |
896 KB |
Output is correct |
3 |
Correct |
1 ms |
896 KB |
Output is correct |
4 |
Correct |
1 ms |
896 KB |
Output is correct |
5 |
Correct |
1 ms |
896 KB |
Output is correct |
6 |
Correct |
1 ms |
896 KB |
Output is correct |
7 |
Correct |
1 ms |
896 KB |
Output is correct |
8 |
Correct |
1 ms |
640 KB |
Output is correct |
9 |
Correct |
1 ms |
896 KB |
Output is correct |
10 |
Correct |
1 ms |
896 KB |
Output is correct |
11 |
Correct |
1 ms |
896 KB |
Output is correct |
12 |
Correct |
1 ms |
896 KB |
Output is correct |
13 |
Correct |
0 ms |
384 KB |
Output is correct |
14 |
Correct |
1 ms |
640 KB |
Output is correct |
15 |
Correct |
1 ms |
512 KB |
Output is correct |
16 |
Correct |
0 ms |
384 KB |
Output is correct |
17 |
Correct |
25 ms |
2176 KB |
Output is correct |
18 |
Correct |
24 ms |
2176 KB |
Output is correct |
19 |
Correct |
24 ms |
2168 KB |
Output is correct |
20 |
Correct |
2 ms |
1792 KB |
Output is correct |
21 |
Correct |
3 ms |
1920 KB |
Output is correct |
22 |
Correct |
3 ms |
1920 KB |
Output is correct |
23 |
Correct |
3 ms |
1920 KB |
Output is correct |
24 |
Correct |
2 ms |
1792 KB |
Output is correct |
25 |
Correct |
890 ms |
7544 KB |
Output is correct |
26 |
Correct |
867 ms |
7544 KB |
Output is correct |
27 |
Correct |
872 ms |
7544 KB |
Output is correct |
28 |
Correct |
7 ms |
4992 KB |
Output is correct |
29 |
Correct |
18 ms |
5760 KB |
Output is correct |
30 |
Correct |
20 ms |
5888 KB |
Output is correct |
31 |
Correct |
22 ms |
5752 KB |
Output is correct |
32 |
Correct |
19 ms |
5760 KB |
Output is correct |
33 |
Correct |
53 ms |
27256 KB |
Output is correct |
34 |
Correct |
52 ms |
26616 KB |
Output is correct |
35 |
Correct |
54 ms |
26616 KB |
Output is correct |
36 |
Correct |
55 ms |
26616 KB |
Output is correct |
37 |
Execution timed out |
5007 ms |
27284 KB |
Time limit exceeded |
38 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
7 ms |
640 KB |
Output is correct |
2 |
Correct |
6 ms |
640 KB |
Output is correct |
3 |
Correct |
1 ms |
512 KB |
Output is correct |
4 |
Correct |
1 ms |
384 KB |
Output is correct |
5 |
Correct |
1 ms |
640 KB |
Output is correct |
6 |
Correct |
1 ms |
640 KB |
Output is correct |
7 |
Correct |
1 ms |
640 KB |
Output is correct |
8 |
Correct |
1 ms |
640 KB |
Output is correct |
9 |
Correct |
1 ms |
512 KB |
Output is correct |
10 |
Correct |
1 ms |
384 KB |
Output is correct |
11 |
Correct |
1 ms |
640 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
512 KB |
Output is correct |
2 |
Correct |
366 ms |
89820 KB |
Output is correct |
3 |
Correct |
781 ms |
191488 KB |
Output is correct |
4 |
Correct |
842 ms |
192504 KB |
Output is correct |
5 |
Correct |
792 ms |
192376 KB |
Output is correct |
6 |
Correct |
242 ms |
89848 KB |
Output is correct |
7 |
Correct |
463 ms |
172064 KB |
Output is correct |
8 |
Correct |
487 ms |
176632 KB |
Output is correct |
9 |
Correct |
1 ms |
384 KB |
Output is correct |
10 |
Correct |
0 ms |
384 KB |
Output is correct |
11 |
Correct |
2 ms |
896 KB |
Output is correct |
12 |
Correct |
1 ms |
768 KB |
Output is correct |
13 |
Correct |
1 ms |
512 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
384 KB |
Output is correct |
2 |
Correct |
1 ms |
896 KB |
Output is correct |
3 |
Correct |
1 ms |
896 KB |
Output is correct |
4 |
Correct |
1 ms |
896 KB |
Output is correct |
5 |
Correct |
1 ms |
896 KB |
Output is correct |
6 |
Correct |
1 ms |
896 KB |
Output is correct |
7 |
Correct |
1 ms |
896 KB |
Output is correct |
8 |
Correct |
1 ms |
640 KB |
Output is correct |
9 |
Correct |
1 ms |
896 KB |
Output is correct |
10 |
Correct |
1 ms |
896 KB |
Output is correct |
11 |
Correct |
1 ms |
896 KB |
Output is correct |
12 |
Correct |
1 ms |
896 KB |
Output is correct |
13 |
Correct |
0 ms |
384 KB |
Output is correct |
14 |
Correct |
1 ms |
640 KB |
Output is correct |
15 |
Correct |
1 ms |
512 KB |
Output is correct |
16 |
Correct |
0 ms |
384 KB |
Output is correct |
17 |
Correct |
25 ms |
2176 KB |
Output is correct |
18 |
Correct |
24 ms |
2176 KB |
Output is correct |
19 |
Correct |
24 ms |
2168 KB |
Output is correct |
20 |
Correct |
2 ms |
1792 KB |
Output is correct |
21 |
Correct |
3 ms |
1920 KB |
Output is correct |
22 |
Correct |
3 ms |
1920 KB |
Output is correct |
23 |
Correct |
3 ms |
1920 KB |
Output is correct |
24 |
Correct |
2 ms |
1792 KB |
Output is correct |
25 |
Correct |
890 ms |
7544 KB |
Output is correct |
26 |
Correct |
867 ms |
7544 KB |
Output is correct |
27 |
Correct |
872 ms |
7544 KB |
Output is correct |
28 |
Correct |
7 ms |
4992 KB |
Output is correct |
29 |
Correct |
18 ms |
5760 KB |
Output is correct |
30 |
Correct |
20 ms |
5888 KB |
Output is correct |
31 |
Correct |
22 ms |
5752 KB |
Output is correct |
32 |
Correct |
19 ms |
5760 KB |
Output is correct |
33 |
Correct |
53 ms |
27256 KB |
Output is correct |
34 |
Correct |
52 ms |
26616 KB |
Output is correct |
35 |
Correct |
54 ms |
26616 KB |
Output is correct |
36 |
Correct |
55 ms |
26616 KB |
Output is correct |
37 |
Execution timed out |
5007 ms |
27284 KB |
Time limit exceeded |
38 |
Halted |
0 ms |
0 KB |
- |